#include <stdio.h>
#include <string.h>
int yuanyin(char a[], char b[])
{
	int i, j = 0, k, l;
	char x;
	l = strlen(a);
	for (i = 0; i < l; i++)
	{
		if (a[i] == 'a' || a[i] == 'e' || a[i] == 'i' || a[i] == 'o' || a[i] == 'u')
		{
			b[j] = a[i];
			j++;
		}
	}
	b[j] = '\0';
	k = strlen(b);
	for (i = 0; i < k; i++)
	{
		for (j = i; j < k; j++)
		{
			if (b[i] > b[j])
			{
				x = b[j]; b[j] = b[i]; b[i] = x;
			}
		}
	}
	return 0;
}
int main()
{
	char a[100], b[100];
	gets_s(a);
	yuanyin(a, b);
	puts(b);
	return 0;
}
/*ssddfjbjknejbsjdvdjdjvvnd dvvn jergbdsdmv vv
vdgergergweggfwewgwegweg*/